Mozilla has released Firefox 80.0.1, an out of band update designed to fix crashes caused by GPU resets and issues affecting downloads triggered by browser extensions. The update also fixes rendering issues on some websites that are using WebGL to render content. Firefox 80 was released a week ago with a new and faster extensions blocklist that enhances the web browser’s performance and scalability. If you have automatic updates enabled in Firefox’s options, you only have to restart the browser to have it installed automatically.
Source: https://www.bleepingcomputer.com/news/software/firefox-8001-rolls-out-to-fix-crashes-and-download-issues/